In an isometric exercise a person places a hand on a scale and pushes vertically...

J

Joe

New member
...downward, keeping the forearm? In an isometric exercise a person places a hand on a scale and pushes vertically downward, keeping the forearm horizontal. This is possible because the triceps muscle applies an upward force M perpendicular to the arm, as the drawing indicates. The forearm weighs 21.0 N and has a center of gravity as indicated. The scale registers 112 N. Determine the magnitude of M. The forearm measures .3 meters and the distance between the upper arm bone and the elbow joint is .0250. the center of gravity is .150 meters
 
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